Authorities said Natalie Keepers was excited to be a part of something secretive and special in the murder of 13-year-old Nicole Lovell.br Make ABC News your daily news outlet for breaking national and world news, broadcast video coverage, and exclusive interviews that will help you stay up to .br A 14-year-old Massachusetts high school student charged with killing a teacher has been ordered held without bail.br Tornadoes may be possible in the Chattanooga area this evening. The National Weather Service says severe storms are expected starting late this afternoon .